Friendly English LCD display, 16 zone wireless, 8 zone wired. It learns code automatically, high reliability and simple operation. Auto-dial6 groups of alarm phone number repeatedly for 3 times. Digital voice recording for 10 seconds. Field Monitoring and dialogue can calls to judge on the situations to take countermeasures. Exit delay and enter delay (8-88S selectable). Partial arm function. Auto arm function. It learns code External siren alarm or mute alarm model(selectable) Line-cut alarm function: The host will give sirens for 20 seconds immediately after it detects that the telephone wire is cut. Backup power supply